A135585 - cp's OEIS frontend

A135585 a(n) = Sum_{i=1..n} (floor(S2(i)/3) mod 2), where S2(i) = A000120(i).

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	2
12	2
13	3
14	4
15	5
16	5
17	5
18	5
19	6
20	6
21	7
22	8
23	9
24	9
25	10
26	11
27	12
28	13
29	14
30	15
31	16
32	16
33	16
34	16
35	17
36	17
37	18
38	19
39	20
40	20
41	21
42	22
43	23
44	24
45	25
46	26
47	27
48	27
49	28
50	29
51	30
52	31
53	32
54	33
55	34
56	35
57	36
58	37
59	38
60	39
61	40
62	41
63	41
64	41
65	41
66	41
67	42

[0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 4, 5, 5, 5, 5, 6, 6, 7, 8, 9, 9, 10, 11, 12, 13, 14, 15, 16, 16, 16, 16, 17, 17, 18, 19, 20, 20, 21, 22, 23, 24, 25, 26, 27, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 41, 41, 41, 41, 42]

cp's OEIS Frontend

A135585 a(n) = Sum_{i=1..n} (floor(S2(i)/3) mod 2), where S2(i) = A000120(i).

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	2
12	2
13	3
14	4
15	5
16	5
17	5
18	5
19	6
20	6
21	7
22	8
23	9
24	9
25	10
26	11
27	12
28	13
29	14
30	15
31	16
32	16
33	16
34	16
35	17
36	17
37	18
38	19
39	20
40	20
41	21
42	22
43	23
44	24
45	25
46	26
47	27
48	27
49	28
50	29
51	30
52	31
53	32
54	33
55	34
56	35
57	36
58	37
59	38
60	39
61	40
62	41
63	41
64	41
65	41
66	41
67	42

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	2
12	2
13	3
14	4
15	5
16	5
17	5
18	5
19	6
20	6
21	7
22	8
23	9
24	9
25	10
26	11
27	12
28	13
29	14
30	15
31	16
32	16
33	16
34	16
35	17
36	17
37	18
38	19
39	20
40	20
41	21
42	22
43	23
44	24
45	25
46	26
47	27
48	27
49	28
50	29
51	30
52	31
53	32
54	33
55	34
56	35
57	36
58	37
59	38
60	39
61	40
62	41
63	41
64	41
65	41
66	41
67	42

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	2
12	2
13	3
14	4
15	5
16	5
17	5
18	5
19	6
20	6
21	7
22	8
23	9
24	9
25	10
26	11
27	12
28	13
29	14
30	15
31	16
32	16
33	16
34	16
35	17
36	17
37	18
38	19
39	20
40	20
41	21
42	22
43	23
44	24
45	25
46	26
47	27
48	27
49	28
50	29
51	30
52	31
53	32
54	33
55	34
56	35
57	36
58	37
59	38
60	39
61	40
62	41
63	41
64	41
65	41
66	41
67	42